The yaSSH software package is a fast,
dual-licensed implementation of SSH. It will
include an SSH client, a client library, a server,
and a server library. It is focused on speed,
limited memory requirements, a simple API,
portability, and use in an embedded setting.

yaSSL is a C++ based SSL library for embedded and RTOS environments, designed for individuals who prefer to use the C++ language. For a C-based solution, please see CyaSSL. yaSSL supports the industry standards up to TLS 1.2, and also includes an OpenSSL compatibility interface.

Yappy provides a lexical analyser and a LR parser generator
for Python applications. Currently it builds SLR, LR(1), and
LALR(1) parsing tables. Tables are kept in Python shelves for
use in parsing. Some ambiguous grammars can be handled
if priority and associativity information is provided.

The yawiki engine is the underlying rendering
engine of the yawiki application. It is a
standalone rendering engine to convert wiki markup
into HTML. It can be included in any application.
So far it covers three different markups: BBCode,
the old yawiki markup, and the Creole 1.0
specification.

This is a comprehensive "word game" word list for UNIX/Linux. It is a superset of the author's ENABLE list, the "OSW", and various lists researched by the author's colleague, Alan Beale. At 264,093 words, it is the largest list of its kind, suitable for use in all manners of crossword-type board games and word construction games, as well as for a spell checker dictionary. The YAWL package now includes two anagramming utilities (supplied as source code, handled by the included Makefile). There is also a shell script that extends the UNIX "strings" system command. This is the word list package recommended for the author's Quackey word game.

Yeanpypa is (yet another) framework to create
recursive-descent parsers in Python. It is heavily
inspired by frameworks like pyparsing or
boost::Spirit. Parsers are created by writing an
EBNF-like grammar as Python expressions.

Z80~Ex is a portable ZiLOG Z80 CPU emulator
designed as a library. Goals include precise
opcode emulation (documented and undocumented),
exact timings for each opcode (including I/O
operations), and ability to emulate several
virtual CPUs simultaneously. A Z80 code
dissasembler is also included.